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[几何] 在C处的切线平行于B处的陪位中线

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hbghlyj Posted at 2025-1-8 07:59:07 |Read mode
$A(0,0),B(2,0)$
求证:曲线$$2 \tan ^{-1}\left(\frac{x}{y}\right)+y=c$$($c$为常数)在其上任一点$C$的切线与$BC$的夹角等于$\angle ABD$,其中$D$为$AC$的中点。
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 Author| hbghlyj Posted at 2025-4-3 17:04:46
是否可以使用@kuing的回答所用的方法来证明呢

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2025-4-20 22:11 GMT+8

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